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Finding the Fourth Proportional to 67,229.28, 92,780.64 and 38,944.08

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Solution

The fourth proportional to 67,229.28, 92,780.64 and 38,944.08 is: 53,745.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,229.28 : 92,780.64 = 38,944.08 : x
  2. Step 2: Convert to fraction form
    67,229.28/92,780.64 = 38,944.08/x
  3. Step 3: Cross multiply
    67,229.28x = 92,780.64 × 38,944.08
  4. Step 4: Simplify right side
    67,229.28x = 3,613,256,666.61
  5. Step 5: Solve for x
    x = 3,613,256,666.61/67,229.28
  6. Step 6: Final answer
    x = 53,745.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.